404406073 has 4 divisors (see below), whose sum is σ = 418351140. Its totient is φ = 390461008.

The previous prime is 404406049. The next prime is 404406133. The reversal of 404406073 is 370604404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 312476329 + 91929744 = 17677^2 + 9588^2 .

It is a cyclic number.

It is not a de Polignac number, because 404406073 - 2²⁵ = 370851641 is a prime.

It is a super-3 number, since 3×404406073³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404406043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6972490 + ... + 6972547.

It is an arithmetic number, because the mean of its divisors is an integer number (104587785).

Almost surely, 2^404406073 is an apocalyptic number.

It is an amenable number.

404406073 is a deficient number, since it is larger than the sum of its proper divisors (13945067).

404406073 is a wasteful number, since it uses less digits than its factorization.

404406073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13945066.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 404406073 is about 20109.8501486212. The cubic root of 404406073 is about 739.5017787104.

The spelling of 404406073 in words is "four hundred four million, four hundred six thousand, seventy-three".